NSString 字符串处理：截取字符串、匹配字符串、分隔字符串

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-1.截取字符串

NSString*string =@"sdfsfsfsAdfsdf";string = [string substringToIndex:7];//截取掉下标7之后的字符串NSLog(@"截取的值为：%@",string);[string substringFromIndex:2];//截取掉下标2之前的字符串NSLog(@"截取的值为：%@",string);

• 2.匹配字符串

NSString*string =@"sdfsfsfsAdfsdf";NSRangerange = [stringrangeOfString:@"f"];//匹配得到的下标NSLog(@"rang:%@",NSStringFromRange(range));string = [string substringWithRange:range];//截取范围类的字符串NSLog(@"截取的值为：%@",string);

• 3.分隔字符串

NSString*string =@"sdfsfsfsAdfsdf";NSArray *array = [string componentsSeparatedByString:@"A"]; //从字符A中分隔成2个元素的数组NSLog(@"array:%@",array); //结果是adfsfsfs和dfsdf